PPAP Deliverables: Requirements Column

Within the PFMEA and CP is the requirements column.  As a shared column, the data entered on one deliverable is shared with the other.  This column is different from the other data table columns because it shares a lot of functionality with our FAI and QMS modules.

Requirements Column

The column is divided into three sub-columns:

• Description: a generic text cell with one special ability:  
  • When specification data is entered in specific formats, it can automatically update the specification column (including future edits)
• Specification: typically associated with variable data. 
  • This column contains data fields for:
    • Tolerance type

      • Symmetrical, Bilateral, Unilateral Upper, Unilateral Lower, Basic Dimension, and Range Inclusive

    • GDT Callout
      • The GD&T callout frame of the characteristic, if applicable. This field should not be used when entering a feature without a callout frame
    • Specification numerical values
      • Fields available depend on the tolerance type specified
  • If specification data was originally entered into the description column, updating values in the specification column will update those values within the description column
• Units: units associated with specification data.  This is a retainable drop down that can be customized
  • The requirements column currently supports unicode GDT symbol entry.  Here is a unicode table for reference: https://en.wikipedia.org/wiki/Geometric_dimensioning_and_tolerancing

Description

A generic text cell used to describe the characteristic further from the product or process characteristic columns.  This cell has one special ability:  

• • When specification data is entered in specific formats, it can automatically update the specification column (including future edits)

Specification

Specified requirement for the design characteristic (e.g., drawing or DPD dimensional characteristic with associated nominal dimension and tolerances, drawing notes, specification requirements).  Note that angle features with degrees/minutes/seconds should be converted to decimal degrees. 

Tolerance Type

Contains the following options:  Symmetrical, Bilateral, Unilateral Upper, Unilateral Lower, Basic Dimension, and Range Inclusive.

Note, if the row does not contain any data the default selection is symmetrical.  If a row does not need specification data, please ignore this column and review the information below in "View Mode".

Tolerance Type	Fields available	Drawing example
Symmetrical	Nominal and one bilateral tolerance value
Bilateral	Nominal and two different tolerance values
Unilateral Upper	High specification limit only
Unilateral Lower	Low specification limit only
Basic Dimension	Nominal only
Range Inclusive	Upper and lower specification limits

GDT Callout

Two options exist within the pop up: "GDT Builder" allows you to create a GD&T callout frame using the provided inputs, while "Freeform GDT" can be used to type a callout frame using a specialized font mapped to keys on your keyboard.

• Specification values entered will not be reflected in the GDT builder
• Tolerance added to the GDT builder will update the tolerance in the specification cell and potentially update the description

Units

To enter a symbol for unit, copy and paste the symbol into the cell.  These symbols must be unicode friendly.  Here is a unicode table for reference: https://en.wikipedia.org/wiki/Geometric_dimensioning_and_tolerancing.

View Mode

When first loading a PFMEA or CP tab, the deliverable will likely be in view mode.  This column will display an aggregation of the information found in the three columns.

Importing

Section to come soon.

Tolerance type is not a column in the requirements group for import.  The system will automatically determine the tolerance type using the following logic:

1. If entry includes an upper and lower specification and no nominal then treat as tolerance type “Range Inclusive”

2. If only an upper specification or high tolerance is entered, treat tolerance type as “Unilateral Upper”

3. If only a lower specification or low tolerance is entered, treat tolerance type as “Unilateral Lower”

4. If only nominal entered, treat tolerance type as “Basic Dimension”

5. If nominal and high and low tolerances are entered, treat tolerance type as “Bilateral”

6. If nominal and high and low tolerances are added (which are the same), treat tolerance type as “Symmetrical”

7. If no specification data is entered, it defaults to Symmetrical and can be ignored